I've encountered a weird thing during my play. I managed to get a "Pulverized" call out for like 15 skeletons and only got about 20 XP points, and afterward I only got the call out message (for "Destruction", "Massacre" etc.) and not the points, until I leveled up.
The no XP thing has happened to me before, but I thought it was some kind of bug. Does anybody know about this thing? is there a limit for extra XP per level or something?